Has your Bf/So changed since finding out your expectingi

I just really need to vent tonight...i feel ever since ive found out im pregnant my bf has started to act different i feel he does things he knows will push my buttons..For example today he asked my dad if he could use his car to go cut hair ( hes a barber) (mines is in the shop)said hed be back in a few he left at 4pm and is just now gettin back to the house it was 10:30pm when he walked through the door , i called around 7ish because my dad asked where he was because he was ready to leave..he said he was almost done then around 8:49pm i get a text saying hes on his way just gettin gas i had asked him earlier to grab me some chips i asked him if he remembered he said ya the drive from where he was at is 45mins from the house its 9:30pm hes still not home and not answering the phone my dad is getting upset cause hes been gone for dam near 6.5hrs hr walks in and i ask where my chips are and he goes oh i forgot i say well why did you tell me you had remembered when in reality you never got them..im irritated and he doesnt understand why..im upset because he doesnt see the issue in having my dad wait for 6 hours for his car ..we used to have fun we both agree about this now its agruements and frustration we havenr been together that long and this pregnancy was definitely a surprise i just dont want to go through my whole pregnancy feeling irritated and upset all the time